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分析了辽河干流典型风沙区林地、草地和农田土壤颗粒的分形维数空间分布特征。结果表明:土壤颗粒分形维数总体表现为农田高于林地和草地,且在农田土壤30~50cm深度时达到最大值(2.58),在草地土壤0~10cm出现最小值(2.26);在林地土壤中随深度增加而减小,在草地和农田土壤中随深度增加而增加。土壤分形维数均与粉粒含量极显著正相关(P<0.01)。农田更有利于土壤细小颗粒的形成,改良土壤质地,土壤结构相对较好,其次是林地,草地相对较差。
The spatial distribution characteristics of soil particles in forestland, grassland and farmland in typical windy and sandy areas of Liaohe River were analyzed. The results showed that the overall fractal dimension of soil particles was higher than that of forest land and grassland, and reached the maximum (2.58) at the depth of 30-50 cm in farmland and 2.26 at 0-10 cm in grassland soil. Decreases with depth and increases with depth in grassland and farmland soil. The fractal dimension of soil was significantly and positively correlated with the content of silt (P <0.01). Farmland is more conducive to the formation of soil fine particles, improve soil texture, soil structure is relatively good, followed by woodland, grassland is relatively poor.